US1244385A

US1244385A - Drilling-machine.

Info

Publication number: US1244385A
Application number: US14441417A
Authority: US
Inventors: Dane Spehar
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-01-25
Filing date: 1917-01-25
Publication date: 1917-10-23
Anticipated expiration: 1934-10-23

Description

0. SPEHAR.

DRILLING MACHINE.

APPLICATION FILED JAN-25.1%].

1,244,385. Patented 001;. 23,1917.

3 SHEETS-SHEET I.

D. SPEHAR.

DRILLING MACHINE.

APPLICATION FILED JAN-25.1917.

1,244,385. Patented Oct. 23,1917.

3 SH'EETSSHEET 2.'

WITNESSES INVENTOR D/HYE -PEHHR MM A TTORNEYS D. SPEHAR.

DRILLING MACHINE.

APPLICATION FILED IAN.25. I917.

1,244,385. Patented Oct. 23,1917.

' 3 SHEETS-SHEET 3.

/5 2/ U B 9 23 I I 26 25 I I I I INVEAITOR D fl NE 5 P B 1-1 A R ,4 from; rs

WITNESSES 7/, I/M

DANE SPEHAR, OF MIAMI, ARIZONA.

DRILLING-MACHINE.

Specification of'Iietters Patent.

Patented :Oct. 23, 1917.

Application filed January 25, 1917. Serial N 0. 144,414.

1 b cZZ who-m it may concern:

Be it known that I, DANE SIEI-IAR, a citizen of the United States, and a resident of ll'illtlllll; in the county of Gila and State of Arizona, have made certain new and useful improvements in Drilling- Machines of which the following is a specification.

One of the principal objects of my inven tion is to provide an improved drilling machine designed particularly for prospecting work which may be operated by one man, and so constructed that it may be readily taken apart, and packed in a relatively small space for transportation.

Another object of the invention is to proide an improved drilling machine which is mechanically operated, and in which the blows are delivered through the alternate contraction and expansion of a spring.

A further object of the invention provides an improved method of automatically causing the intermittent rotation of the drill.

A still. further object of the invention is to provide an improved drill which is comparatively simple, durable, efficient in operation, and inexpensive to manufacture and maintain. v

With these and other objects in view which will become apparent as the description proceeds, the invention resides in the construction, combination and arrangement of parts hereinafter =more fully described and claimed, and illustrated in the accompanying drawings in which like characters of reference indicate like parts throughout the several figures, of which:

Figure 1 represents an elevational view of a drill constructed according to my invention.

Fig. 2 represents an elevational view looking at right angles to Fig. 1.

Fig. 3 represents an elevational view of a portion ofthe drill shaft showing the arnngement of the key-ways. y

Fig. 4 represents a longitudinal sectional view takenthrough the drill on the plane indicated bythe line H of Fig. 1.

Fig. '5 represents a horizontal sectional View taken on the line 5-5 of Fig. 4.

Fig. 6 represents a horizontal sectional view taken on the line 66 of Fig. 4;.

Fig. 7 represents a horizontal sectional view taken on the plane. indicated by the line 77 of Fig. 4.

Fig. 8 represents a view in, perspective of the trigger.

Fig. 9 represents a horizontal sectional view taken on the plane indicated by the line 9-9 of Fig. l.

Fig. 10 represents a fragmentary vertical sectional view taken on the plane indicated by the line 10-10 of Fig. 6.

Fig. 11 represents a fragmentary elevational View of the ratchet sleeve and the trigger associated therewith, showing the position of the parts as the sleeve begins an upstroke.

Fig. 12 represents a similar View showing the position of the parts during the upstroke of the sleeve, and

F ig. 13 represents a similar view showing the position of the parts during the downstroke of the sleeve.

Referring more particularly to the drawing, a cylindrical casing, in which the drill shaft reciprocates, is indicated at 5, and at the lower end of the casing is disposed a plug 6, through which the drill shaft or spindle slides, said plug being threaded into the end of the casing and being provided with a polygonal head 7, whereby it may be readily removed when desired.

The upper end of the casing isturned into an internally threaded boss 8, which carries the spaced legs 9 of a handle. The boss may be secured against rotation relatively to the casing by means of set screws 10. The upper ends of the legs 9 are offset outwardly from each other and support a suitable handle 11, whereby the operator may grip the machine. A spreader 12 is arranged between the lugs 9 for suitably spacing and supporting them.

Extending laterally from the legs 9 are the opposite pairs of spaced

ears

13 and 14 respectively, such ears forming terminals of strips of metal secured by rivets or other suitable fastenings 15 to the opposed inner faces of the legs 9. Threaded into an opening in each ear is av brass or other suitable bushing 15, and these bushings support the stub shafts 16. Each pair of ears thus rotatably supports one of the shafts 16. Mounted on the shafts 16 for rotating them arethe intermeshing gear wheels 17 of similar size, and from this arrangement it follows that when one of the gears is driven the shafts 16 will be driven in opposite directions, and at a common rate of speed. Adjustably mounted by a bolt and slot connection indicated at 18 on oneof the gears 17 is a crank arm 19, carrying a crank handle 20, by means of which the gears may be manually driven.

Keyed on each of the shafts 16, between the bosses in which such shaft is journaled, is a driving gear. Each driving gear includes a pair of spaced substantially annular plates 21, which plates at diametrically opposed points, are flattened as at (see Fig. 4.) Connecting these plates adjacent their peripheries are the opposed series of pins 23 and 2e, on which pins and between the plates, rollers are mounted.

The rollers are situated at equally spaced apart points, around the entire periphery of the plates 21, except at those portions of the plates which are flattened, as indicated in Fig. 4 and this construction forms in effect interrupted or mutilated driving gears. These gears move in opposed directions, and at a common rate of speed as the gears 1'7 are rotated.

The upper portion of the spindle or shaft is indicated at 26 and the lower portion of saic. shaft at 27. Segment 26 is provided on opposed sides with substantially cylindrical rack teeth 28 having flatt ned lower surfaces 29, and the rack teeth in each series correspond in number to the number of rollers in each of the two series of rollers carried by the driving gears. The teeth 28 project inwardly beyond the peripheries of the driving gears, said segment 26 being, as indicated in Fig. a, arranged between the driving gears, and as indicated in the drawing, as the driving gears are revolved, the rollers engage beneath tee teeth 28 and move the drill spindle upwardly until such time as opposed flattened portior of the driving gears move into proximity with the segment 26, at which time the teeth 28 will be free of engagement with any of the rollers, whereby the spindle is released, it being moved downwardly under the influence of the spring 30 for delivering a blow. By having each of the driving gears equipped with two-series of rollers it will be evident that the spindle will he raised twice during one complete revolution of the gears 17, so that rapid blows will thus be struck, without driving the gears 17 above a moderate speed. 7

While the upper segment 26 of the spindle has a reciprocatory motion only, the lower segment 27 has a rotary as well as a reciprocatory motion, and in order to allow rotation of the lower segment relatively to the upper, a suitable coupling is provided. This coupling includes a split shouldered ring indicated generally at 31, and each of the segments of the ring has formed thereon an upwardly extending arm 32 provided with a lug fitting into an indentation 355 formed in the spindle segment 26. Suitable set screws 34 detachably secure each of the arms 32 to the spindle segment 26. The shoulders formed on the ring segments 31 thus form a collar which fits into a groove 35 cut in the upper end of the spindle segment 27 and circumferentially of the same. in disconnecting the spindle segments, it is only necessary to unscrew the set screws 34: suiliciently to disengage the segment. 26 whereupon the segments of the spindle may be taken apart.

A spring 30 before mentioned bears at its upper end against an annular ring 86 ar ranged within the casing 5, and held against movement upwardly, in said casing, by means of a collar 37 riveted or otherwise secured in place as indicated at 38. The lower end of the spring bearsagainst a ring 39 which is loose within the casing, and which abuts against the upper end of the ratchet sleeve 5L0. This sleeve is keyed or otherwise fixed on the spindle segment 2 and moves with said segment. When the spindle is drawn upwardly as the gears are rotated, the spring is compressed, and the moment that the spindle is released the action of the spring in forcing the spring downwardly, delivers a working blow. Downward movement of the spindle, if not previously stopped by engagement of the drill point with the work, is limited by the movement of the lower end of ratchet sleeve 40 into engagement with the plug 6.

Arranged within the casing is a ratchet wheel 41. This ratchet wheel surrounds the ratchet sleeve and said ratchet sleeve is adapted to reciprocate through the wheel. This wheel 'is held against reciprocatory movement relatively to the casing by means of a substantially Ushaped keeper indicated at i2, the ends of which keeper projecting toward the spindle occur above and below the ratchet wheel. The keeper does not, however, interfere in the slightest witn the rotary movement of the ratchet wheel. in order that the ratchet wheel and ratchet sleeve will rotate in unison at the same time that the sleeve reciprocates relatively to the wheel, said wheel is prcwided with gib keys &3 slidable in grooves in the sleeve, hereinafter described.

In order that the ratchet wheel 41 will be allowed to rotate only in one direction, spring pressed ,pawls 4 1 are provided. These pawls are arrangedat diametrically opposed points of the ratchet wheel, and are connected by means of bolts or other fastenings 45 with lugs e6 formed on the casing 5 of the machine.

The ratchet sleeve 40 is provided exteriorly with a. plurality (preferably 1:2) of longitudinally extending equally spaced grooves or key-ways e7, having squared upper and lower ends 48, and the grooves d7 are interconnected adjacent their upper ends by inclined ways 48 which extend in a common direction and which occur at an angle of about degrees, as clearly shown in Figs. 11 to 13 inclusive of the drawing. Adapted toride in the grooves 4L7 are a pair of diametrically opposed triggers indicated generally 4C9, These triggers are arranged within the cylindrical casing 5, and each includes a cylindrical portion 50 mounted for oscillation at one end in a socheted plug 51 (see Fig, 10) threaded into an opening in the wall of easing 5. The triggers each include a substantially rectangular shoe 51 adapted to ride in the grooves or keyways, and at right angles to. its shoe 51 each key is equipped with a weighted arm thrust downwardly by a spring carried by the casing 5 (Fig. .6).

The shoe portions 51 01": the triggers fit tor sliding movement into one of the grooves it? on opposite sidesoif the ratchet sleeve a1, and as the sleeve moves downwardly with the spindle as the working stroke is imparted through the action of the expanding Spring 30, each shoe will, so to speak, ride upwardly in a groove in which it fits until the end of the working stroke is reached, at "which time the shoe will be at the upper end of the particular groove in which it may happen to be working. As the shoe comes opposite the upper end of the inclined Way l8 leading into this groove, the action or" the spring in continuously pressing downwardly on the arm will move the shoe 51* into alinen'ient with the said inclined way in the position indicated in Fig. 11,,and as soon as the ratchet sleeve starts upwardly with the spindle for compressing the spring,

the cam action between the shoe 51 and inclined way e8 will shift or rotate the ratchet sleeve, and with it the lower segment of the ratchet spindle about its axis, the distance occurring between two adjacent grooves or keyways 4:7, and as the upward motion. of the ratchet sleeve continues as indicated in Fig. 12, the shoe will line up with the next groove in which it runs, thus stopping the rotary movement of the spindle,

and confining it to a longitudinal reciprocatory movement, until the end of the next working stroke will have been reached, whereupon the same operation will be repeated. It will thus be seen that as the spindle is reciproc-ated it is intermittently rotated a part of a revolution. The spring pressed pawl as in coiiperat-ing with the ratchet wheel ll will prevent any tendency for reverse rotation on the part of the spindle. I

The lower end of the spindle or shaft is equipped with a socket 54, in which a plate 55, serrated at its lower portion as at 56, is carried. This plate is adapted to be clamped against the shank of a drill through the action of set screws 57 for securing the drill in place.

Although I have describedthe preferred embodiment of my invention, I may desire to make such changes in the construction,

'i'iovenient and prevented. from moving longitudinally with the spindle and having a shoe to cooperate with the said key-ways and inclined-ways to impart a step by step rotary movement to the spindle.

Y 2. In a drill, a retiprocatory spindle provided with longitudinally disposed keyways and intercoininunicating inclinedways, a trigger mounted to oscillate and prevented from moving longitudinally with the spindle and having a shoe to cooperate with the key-ways and inclined ways to impart a step by step rotary movement to the spindle, a ratchet wheel, having splined connection with the said spindle to turn therewith hut leaving such spindle free to, reciprocate therein, and a pawl coacting with the ratchet wheel to prevent haclovard rotation thereo 3. In a drilling machine, a reciprocatory spindle, means for actuating the spindle, a ratchet sleeve fixed. on the spindle, and having a plurality of spaced parallel grooves extending longitudinally of the sleeve, in-

clined ways extending in a common direction and interconnecting the grooves near the upper ends of the latter, a trigger rela tive to which the ratchet sleeve is adapted to reciprocate, said trigger including a shoe slidable in the grooves, spring means for directing the shoe into one of the inclined ways when the ratchet sleeve reaches one end of its stroke, a ratchet wheel slidably keyed upon the ratchet sleeve, and means coacting with the ratchet wheel in preventing reverse rotation of the ratchet sleeve.

l. A drilling machine including a reciprocatory spindle, a ratchet sleeve fixed there on and provided with a series of spaced parallel grooves extending longitudinally of the sleeve, inclined parallel ways interconnecting the grooves adjacent one end of the latter, a shoe'slidable in the grooves and in relation to which the sleeve isadapted to reciprocate, means for automatically directing the shoe into succeeding inclined ways, as the ratchet sleeve reaches the end of its stroke in one direction, a ratchet Wheel mounted on the sleeve, and means cotiperating with the ratchet wheel in preventing reverse rotation of the ratchet sleeve.

In a drilling machine, a reciprocatory spindle, a ratchet sleeve fixed thereon and provided with a plurality of spaced parallel grooves extending longitudinally of the said sleeve, inclined parallel ways interconnecting the grooves adjacent one end of the latter, a shoe slidable in the grooves and in relation to which tne sleeve is adapted to reciprocate, means for automatically directing the shoe into succeeding Ways as the sleeve reaches the end of its stroke in one direction, and means fer preventing reverse rotation of the ratchet sleeve 6. A drilling machine including a casing, a reciprocatory spindle extending thereinto, a ratchet eleci'e lined in relation to the spindle and arranged Within the casing, said sleeve being provided with a plurality of longitudinally extending parallel grooves, inclined parallel ways interconnecting the grooves adjacent one end of the latter, means mounted on the casing slidably en gaging in the grooves, means for autoinatically directing the first said means into the inclined Ways as the ratchet sleeve reaches the end of its stroke in one direction for imparting an intermittent rotary movement to the ratchet sleeve, a ratchet Wheel slid-ably keyed on the ratchet sleeve, and means carried by the casing cooperating with the ratchet wheel in preventing reverse rotation of the ratchet sleeve.

7. A drilling machine, comprising a cas- Gopies ing, a spindle mounted Within the casing and adapted to have a reciprocatory move ment imparted thereto and provided With longitudinal key-Ways and intercominunieating Ways, a trigger mounted upon the casing and having a shoe to coact With the lon itudinal key-Ways and the inclined-Ways to impart a step by step rotation to the spindle, ratchet vv reel mounted Within the casin g and having the spindle slidable therein and rotatable therewith, and a pawl carried by the casing and cooperating With the ratchet Wheel to prevent backward rotation thereof: and the spindle.

h. In a drilling machine, a reciprocatory spindle, a ratchet sleeve fixed thereon a d provided with a plurality of parallel grooves, inclined grooves interconnecting the parallel grooves, means with respect to which the sleeve reciprocates for traveling in the grooves, and means for automatically causing the travel of the first said means through successive inclined grooves as the sleeve reaches the end of its stroke in one direction for intermittently causing the rotation of the sleeve, and means for preventing reverse rotation of the ratchet sleeve.

DANE SPEHAR.

lVitnesses: V

CHAS. J. Gonnnrorn, S'rnwi M. Arson,

of this patent may be obtained for live cents each, by addressing the Commissioner of Eatents,

Washington, 2). t1.